Page 15

years. Many structures have almost served their useful life; lining of canals and laterals is necessary; many well casings are old; and on some reservations proper protection against flood damage has not been provided. The Bureau of Indian Affairs is preparing rehabilitation and betterment reports on the reservation irrigation systems as rapidly as available manpower can do it. As much of the rehabilitation and betterment work as possible will be done under the Immediate Action (Phase I) program. Any works not completed will be done under the Long Range (Phase II) program. Ground-water projects. Ground-water projects on Indian reservations in Central Arizona are facing the most serious prospect of depletion of ground-water reserves. This is especially true at the Ak Chin, Gila River, Papago, and San Xavier Reservations. The only opportunity for continuing these projects into the longrange future will be for importation of water from the Colorado River. There are approximately 46,500 acres of such lands, which require approximately 230,000 acre-feet of water. Agency Programs. Project investigations should be carried out for the Fort Mohave, and Chemehuevi Reservations on the mainstream of the Colorado River. Plans for these projects have not been completed, although their locations adjacent to the mainstream provide adequate water supply. Uses of water for municipal and industrial purposes on almost all of the reservations is known only in a general way. The exact determinations of future requirements should be investigated more thoroughly. It is known for certain that urban expansion on the Salt River Reservation is eminent, and prospects for industrial 15Epson Perfection 4870 Photo, 400 dpi, 8 bit, 13,838,336 byte